When groupthink is occurring, members tend not to limit themselves to obtaining facts and listening to opinions that support their preferred policy, but instead are more likely to pay closer attention to facts and opinions that do not.

Groupthink is a psychological phenomenon that occurs within a group of people in which the desire for harmony or conformity in the group results in an irrational or dysfunctional decision-making outcome. When groupthink is occurring, members of the group tend to limit themselves to obtaining facts and listening to opinions that support their preferred policy, and they are less likely to pay attention to facts and opinions that contradict it.